One question though, whats the Kindlet JB do? The actual jailbreak install dev certs (i think?), but not sure what the Kindlet JB is. :x And if I decide to update, do I need to remove the Kindlet JB first?

Jailbreak is for installing anything to root partition - and yes consist of nothing more than a dev-certificate. The rest is window dressing and a clever way to copy that key where it needs to go. Kindlet Jailbreak is for active content to run (and maybe break out of their sandbox? not sure on that).

FYI, next time when you ask a question, would be nice if you don't edit it out only because you found an answer. Leave the question, and say you found it and what the answer is (or where). MR is not for your benefit, it is for everybody's benefit. Somebody else with the same question and no solution would like to hear what you found out.

@ixtab, in thread about kindlepdfviewer there was a discussion about KPVBooklet, relying on some stock Amazon Java classes. It searches required method in class by it's signature, so it can resist to obfuscation. Maybe this way will be suitable for some of your patches.

@ixtab, in thread about kindlepdfviewer there was a discussion about KPVBooklet, relying on some stock Amazon Java classes. It searches required method in class by it's signature, so it can resist to obfuscation. Maybe this way will be suitable for some of your patches.

Interesting idea, but it can only be applied in very specific circumstances. It's not suitable for patching classes - even if the method to be patched could be unambiguously identified (the approach only works for them because there is only one method with the given signature in the class), simply going ahead and modifying bytecode that has not been manually examined is a lot like playing russian roulette.

I't optional but IMHO strongly recommended. Its unintrusive, doesn't modify any menu and make it very easy to enable/configure/disable features. You simply access it as if it were an active content (it's listed together with the books). And if you try it, you will also love the margin modify feature.

Recently added the JBPatch (mostly because I could ...Thanks Ixtab!) and found that I really ,REALLY like the hypenations. It's amazing how such a little thing can make a big difference!... so now I'm tempted to try the margins: does anyone have suggested margin settings/adjustments that they like for standard mobi books? Thanks

i upgraded to 5.3.2 and new firmware is awesome, but i realized that i cant read without jbpatch customizations =| i hope ixtab or someone gets a way to at least customize margins. And yes im no developer and cant program crap... in the meantime ill listen emo sad gay songs on youtubs =|

My KPW(5.3.1) is bought from japan.
I followed the step described in the README file.
But after I put update_jbpatch_3.1.0_fw531_install.bin on the device,
I found menu/settings, menu/update your kindle option was grayed out
Any help please
thanks